{
  "$type": "site.standard.document",
  "description": "The present invention relates to a method and an apparatus for controlling a high-pressure fuel supply pump configured to supply pressurized fuel to an internal combustion engine, the solenoid-actuated intake valve 120 being configured to be biased into a first direction towards a first stop…",
  "path": "/patents/1002288",
  "publishedAt": "2012-05-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/20",
    "HITACHI LTD [JP]"
  ],
  "textContent": "The present invention relates to a method and an apparatus for controlling a high-pressure fuel supply pump configured to supply pressurized fuel to an internal combustion engine, the solenoid-actuated intake valve 120 being configured to be biased into a first direction towards a first stop position of the intake valve by means of a biasing force and being configured to be displaced against the biasing force into a second direction opposite to the first direction towards a second stop position of the intake valve by means of magnetic force and to be kept at the second stop position by means of magnetic force, and the method comprising applying control current to the solenoid-actuated intake valve 120 for displacing the intake valve into the second direction to the second stop position and for keeping the intake valve at the second stop position during a first time period ”T0, ”T1 by means of magnetic force; and applying control current to the solenoid-actuated intake valve 120 in a second time period ”T2 after the first time period ”T0, ”T1 during a movement of the solenoid-actuated intake valve 120 from the second stop position into the first direction. The present invention is characterized in that applying control current to the solenoid-actuated intake valve 120 during the second time period ”T2 comprises gradually decreasing the control current, in particular gradually decreasing the control current down to zero.",
  "title": "Method and control apparatus for controlling a high-pressure fuel supply pump configured to supply pressurized fuel to an internal combustion engine"
}